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Thunder Monkey

 5.0 (13)
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Map Key

15.7 Miles 25.2 Kilometers



869' 265 m


-3,554' -1,083 m



Avg Grade (3°)


Max Grade (12°)

6,750' 2,057 m


3,474' 1,059 m


Shared By Tyler Zundel



Getting forecast...

Beautiful alpine ride through some legit MTB country.

Tyler Zundel

Dogs Unknown

Features -none-

The top of this one is on Bogus Basin so ski season will take priority when the snow flies.


Connect the Shafer Butte system with Mahalo and Dry Creek. Unless you're interested in riding back to the ski area on Bogus Basin road after the descent, you'll want to do a shuttle.

This ride has everything - climbs, breathtaking descents, wood and stone features, and some excellent backcountry singletrack.

Need to Know

This is a shuttle ride unless you're into pedaling up 14 miles of pavement after the fun part.


You'll start at the Simplot lodge at Bogus Basin (after leaving a car at the bottom of Dry Creek). The objective is to get to the intersection of Deer Point Trail and Around the Mountain. This map goes right up Deer Point Trail. Another option would be to take Morningstar Trail up to Brewer's Byway, then drop down the top half of Deer Point Trail to the Around the Mountain intersection - either way, take the Around the Mountain trail south (counter clockwise). Travel along this trail for about 1.5 miles until you reach the 2nd of two road crossings (these are bike gated crossings that you won't miss).

On the 2nd crossing, take the road to the south instead of continuing on ATM. You'll be on the road for about 5 minutes when you come to a fork. Take the left fork onto FR 275C. Follow this road until you reach a full gate across the road. Navigate around teh gate and continue down the road to the Mahalo trailhead. This distance is only a couple hundred yards and the trailhead will be on your right - watch closely as it's somewhat hidden. Once you do find Mahalo trailhead, you'll now have 3.3 miles of awesome, legit singletrack to play on. A modest climb out at the end drops you onto the same road you took when you were on Around the Mountain earlier. Go left (south) on the road for approximately 1 mile until you arrive at the unmarked, but well used Dry Creek trailhead - this will be on the right.

Take this trail and hold on to your biscuits because stuff just got real. Over 12 creek crossings and all kinds of excellent terrain await you as you move down the Dry Creek trail. If you survive, you'll arrive at the mouth of the trail to your waiting shuttle rig.


Land Manager: Ridges to Rivers

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Your Check-Ins


Oct 27, 2018
Dustin Blad
Jul 13, 2018
Nick Nedostup
Amazing ride! Met some great people on the trail. Shaded trails in beautiful coniferous trees, multiple stream crossings- very enjoyable! 15.5mi
Jul 12, 2018
Briar Gordon
Jun 18, 2018
Russell Thorman
May 17, 2018
Ridge Hainsworth
Jul 9, 2017
Chris M
Jun 8, 2017
Doug Douglass
Oct 2, 2016
jeremiah grizzy

Trail Ratings

  5.0 from 13 votes


  5.0 from 13 votes
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in Idaho


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17,937 Since Sep 11, 2014
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Richard Croad
Portland, Or
Richard Croad   Portland, Or
the first 13 miles of this are super fun - a couple of tough climbs - but great downhill single track, especially the top half of dry creek. Loved it. Jun 13, 2016
CThornton   Boise
After Dry Creek, climb up Sheep Camp and descend back to town via either Highlands or Corrals to Bob's for full value. Awesome ride! Sep 8, 2018

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